Prevent installing mecab-ko (#1967)

TTS/tts/datasets/__init__.py

@@ -110,6 +110,7 @@ def load_tts_samples(
             formatter = _get_formatter_by_name(formatter_name)
         # load train set
         meta_data_train = formatter(root_path, meta_file_train, ignored_speakers=ignored_speakers)
+        assert len(meta_data_train) > 0, f" [!] No training samples found in {root_path}/{meta_file_train}"
         meta_data_train = [{**item, **{"language": language, "dataset_name": dataset_name}} for item in meta_data_train]
         print(f" | > Found {len(meta_data_train)} files in {Path(root_path).resolve()}")
         # load evaluation split if set

TTS/tts/utils/text/korean/phonemizer.py

@@ -1,9 +1,8 @@
-from g2pkk import G2p
 from jamo import hangul_to_jamo
 
 from TTS.tts.utils.text.korean.korean import normalize
 
-g2p = G2p()
+g2p = None
 
 
 def korean_text_to_phonemes(text, character: str = "hangeul") -> str:
@@ -17,6 +16,11 @@ def korean_text_to_phonemes(text, character: str = "hangeul") -> str:
         output = '하늘' (Unicode :\u1112\u1161\u1102\u1173\u11af), (ᄒ + ᅡ + ᄂ + ᅳ + ᆯ)
 
     """
+    global g2p  # pylint: disable=global-statement
+    if g2p is None:
+        from g2pkk import G2p
+
+        g2p = G2p()
 
     if character == "english":
         from anyascii import anyascii